Equivalent & Substitute Parts for 25AA080B-I/MS

Part Overview

The 25AA080B-I/MS is an 8Kbit EEPROM memory IC manufactured by Microchip Technology, featuring SPI interface operation at 10 MHz with 1K x 8 memory organization. This device operates across a supply voltage range of 1.8V to 5.5V and maintains functionality from -40°C to 85°C. The part is actively produced, RoHS3 compliant, and carries unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified when design requirements permit variations in clock frequency, operating temperature range, package dimensions, or automotive qualification while maintaining core memory capacity and interface compatibility.

Key Parameters

Parameter	Value
Memory Size	8Kbit
Memory Organization	1K x 8
Memory Interface	SPI
Clock Frequency	10 MHz
Write Cycle Time	5ms
Voltage Supply Range	1.8V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package Type	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 25AA080B-I/MS is determined by the following criteria:

Core Compatibility Requirements (Non-Negotiable):

Memory capacity: 8Kbit
Memory organization: 1K x 8
Interface protocol: SPI
Memory type: EEPROM (Non-Volatile)
Mounting type: Surface Mount
RoHS3 compliance

Allowable Variation Parameters:

Clock frequency: 10 MHz or higher (backward compatible)
Operating temperature range: -40°C to 85°C minimum (extended ranges acceptable)
Supply voltage: 1.8V ~ 5.5V minimum overlap required
Package case: 8-MSOP or 8-TSSOP (both 8-pin surface mount packages)
Write cycle time: 5ms or faster
MSL rating: 1 or 3 acceptable
Automotive qualification: Optional enhancement
Packaging format: Tube, Tape & Reel, or Cut Tape acceptable

Substitute parts are grouped by clock frequency capability and package type, as these parameters define the primary functional and physical compatibility boundaries.

Parameter Comparison

Part Number	Manufacturer	Memory Size	Clock Frequency	Package Type	Voltage Supply	Operating Temp	Write Cycle Time	MSL Rating	Automotive Grade
25AA080B-I/MS	Microchip Technology	8Kbit	10 MHz	8-MSOP	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	1	No
AT25080B-XHL-B	Microchip Technology	8Kbit	20 MHz	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	3	No
AT25080B-XHL-T	Microchip Technology	8Kbit	20 MHz	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	3	No
BR25H080FVM-2CTR	Rohm Semiconductor	8Kbit	10 MHz	8-MSOP	2.5V ~ 5.5V	-40°C ~ 125°C	4ms	1	Yes (AEC-Q100)
CAT25080YI-GT3	onsemi	8Kbit	Not Specified	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	1	No
CAV25080YE-GT3	onsemi	8Kbit	20 MHz	8-TSSOP	2.5V ~ 5.5V	-40°C ~ 125°C	5ms	1	Yes (AEC-Q100)
M95080-DFDW6TP	STMicroelectronics	8Kbit	20 MHz	8-TSSOP	1.7V ~ 5.5V	-40°C ~ 85°C	5ms	1	No
M95080-RDW6TP	STMicroelectronics	8Kbit	20 MHz	8-TSSOP	1.8V ~ 5.5V	-40°C ~ 85°C	5ms	1	No
M95080-WDW6TP	STMicroelectronics	8Kbit	20 MHz	8-TSSOP	2.5V ~ 5.5V	-40°C ~ 85°C	5ms	1	No

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (8-MSOP):

BR25H080FVM-2CTR from Rohm Semiconductor maintains identical 8-MSOP package dimensions and 10 MHz clock frequency. This part extends operating temperature to -40°C to 125°C and includes AEC-Q100 automotive qualification. Supply voltage range is 2.5V to 5.5V, which overlaps the original specification. Write cycle time is 4ms, faster than the 5ms requirement. This substitute is suitable for applications requiring automotive-grade components or extended temperature operation.

Package-Variant Substitutes (8-TSSOP):

AT25080B-XHL-B and AT25080B-XHL-T from Microchip Technology operate at 20 MHz with 8-TSSOP packaging. Both maintain 1.8V to 5.5V supply range and -40°C to 85°C operating temperature. The primary difference is packaging format: AT25080B-XHL-B is supplied in Tube, while AT25080B-XHL-T is supplied in Cut Tape and Digi-Reel. MSL rating is 3 (168 hours) versus the original MSL 1. These substitutes are suitable when higher clock frequency is beneficial and PCB layout accommodates 8-TSSOP package dimensions.

M95080-RDW6TP from STMicroelectronics provides 20 MHz operation in 8-TSSOP package with 1.8V to 5.5V supply and -40°C to 85°C temperature range. This part offers high inventory availability (33,400 units) and MSL 1 rating. M95080-DFDW6TP and M95080-WDW6TP are alternative STMicroelectronics variants with identical electrical specifications but different supply voltage minimums (1.7V and 2.5V respectively).

Automotive-Grade Substitutes:

CAV25080YE-GT3 from onsemi combines 20 MHz operation, 8-TSSOP packaging, AEC-Q100 automotive qualification, and extended temperature range (-40°C to 125°C). Supply voltage is 2.5V to 5.5V. This substitute is specified for automotive applications requiring higher clock frequency and extended temperature operation.

CAT25080YI-GT3 from onsemi provides 8-TSSOP packaging with 1.8V to 5.5V supply and -40°C to 85°C operation. Clock frequency is not specified in available data. MSL rating is 1. This substitute is suitable for applications where clock frequency specification is not critical.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25AA080B-I/MS with a part operating at 20 MHz instead of 10 MHz?

A: Yes. Higher clock frequency is backward compatible. A 20 MHz EEPROM can operate in circuits designed for 10 MHz operation. The substitute will function correctly at the lower clock speed. Verify that the PCB layout and package footprint accommodate the selected substitute.

Q: What is the difference between 8-MSOP and 8-TSSOP packages?

A: Both are 8-pin surface mount packages. The 8-MSOP has a body width of 0.118" (3.00mm), while 8-TSSOP has a body width of 0.173" (4.40mm). These are physically different packages requiring different PCB footprints. Verify your PCB design accommodates the selected package before substitution.

Q: Can I use a substitute with extended temperature range (-40°C to 125°C) in place of the original (-40°C to 85°C)?

A: Yes. Extended temperature range is a superset of the original specification. A part rated to 125°C will function correctly in applications limited to 85°C. No design changes are required.

Q: What does MSL 1 versus MSL 3 mean for my application?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be exposed to moisture before soldering. MSL 1 allows unlimited storage time. MSL 3 allows 168 hours of exposure. For standard manufacturing environments with proper moisture control, both ratings are acceptable. If extended storage without desiccant packaging is required, MSL 1 is preferred.

Q: Are automotive-grade substitutes (AEC-Q100) compatible with non-automotive applications?

A: Yes. Automotive-grade components meet or exceed commercial-grade specifications. AEC-Q100 qualified parts can be used in non-automotive applications without restriction. They offer enhanced reliability and temperature stability as additional benefits.

Q: What is the significance of the write cycle time difference (4ms versus 5ms)?

A: Write cycle time is the duration required to complete a single write operation. Faster write times (4ms) are advantageous but not required for compatibility. A 4ms part will function correctly in circuits designed for 5ms write cycles. No timing adjustments are necessary.

Q: Can I substitute based on supply voltage range alone?

A: No. Supply voltage is one of multiple parameters determining substitution validity. All core parameters must align: 8Kbit capacity, 1K x 8 organization, SPI interface, surface mount type, and RoHS3 compliance. Verify all parameters before selection.

Q: Which substitute offers the best inventory availability?

A: M95080-RDW6TP from STMicroelectronics has the highest inventory level at 33,400 units. This part operates at 20 MHz in 8-TSSOP package with 1.8V to 5.5V supply and -40°C to 85°C temperature range, providing strong compatibility with the original specification.

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